Here are some GREAT online resources for learning the letters of the alphabet and their sounds.

Youtubes

ABC Hip Hop by Ah-Choo

Alphardy by Dr. Jean

Who Let the Letters Out? by Dr. Jean

After she sings, "Who let the A out?" say the letter sound three times.

Letter Sounds Song by Jack Hartmann

Hip Hop Alphabet Song by Harry Kindergarten

Starfall -- Alphabet

Elmo Alphabet Rap

Lettercise By Dr. Jean

This is a "get you moving" song that focuses on letter sounds.


Games

Owl and Mouse Letter Sounds

Caboose Learn the ABCs

ABCya! Kindergarten

We've had fun doing the "Alphabetical Order" game with the monkey.
This is a GREAT one for developing computer mouse skills for clicking and dragging.